I had the same issue although I installed a version of Mesa bringing OpenGL 1.4
Check out in /usr/lib and /usr/X11R6/lib. you should have 2 symb links libGL.so and libGL.so.1 taht are linked to a libGL.so.1.2
Assuming you have at least an OpenGL 1.3 installed (or 1.4 like in my case), remove the symb links and replace them to point to the libGL.so.1.4:
# cd /usr/lib
# rm libGL.so libGL.so.1
# ln -s /usr/X11R6/liblibGL.so.1.4 libGL.so
# ln -s /usr/X11R6/liblibGL.so.1.4 libGL.so.1
It was sufficient for me.
Now, I have a pb of performance...